th role mapping details - for review

a chromium team member has tried to work out the th mapping to
rowheader/columnheader based on the firefox implementation. I have captured
her findings in the mapping spec - for review

It would be helpful if Moz folk could take a look.

http://rawgit.com/w3c/aria/gh-pages/html-aam/html-aam.html#th-role-mapping-details---for-review

see chromium issue
https://code.google.com/p/chromium/issues/detail?id=435081

--

Regards

SteveF
HTML 5.1 <http://www.w3.org/html/wg/drafts/html/master/>